Next time you find yourself stuck at a boring conference, take a leaf out of Jack Vale's book.
"I went to 2014 NAMM and called out people's names," explains the prankster. And how did he know their names? They were all wearing great big name badges, of course!
Click play above to enjoy people's priceless, paranoid reactions when they hear their names being mentioned...
SEE ALSO: Jack Vale's Social Media Prank
(Via Daily Picks And Flicks)